PA Lake Fishing Almanac · lakepa.net
Mammoth Dam
Westmoreland County · 27 acres · Other owner
Latest PFBC survey (April 2019)
- Electrofishing captured 192 Largemouth Bass measuring 4 to 22 inches. (p. 3)
- In the electrofishing catch, 12% of Largemouth Bass exceeded 15 inches. (p. 3)
- Of 70 White Crappie captured in trap nets, 89% exceeded 9 inches. (p. 1)
- Trap nets captured 187 Black Crappie measuring 4 to 11 inches. (p. 1)
PFBC Biologist Report: Mammoth Lake
On PFBC's 2026 trout schedule (as published Oct 4, 2026)
- Was scheduled for Mar 4, 2026 · Rainbow, Golden Rainbow
- Was scheduled for Apr 10, 2026 · Rainbow, Golden Rainbow
- Was scheduled for Apr 21, 2026 · Rainbow
- Was scheduled for Oct 13, 2026 · Rainbow
PFBC: “All stocking events are subject to change without notice.”
Fish consumption advice (2026 list)
No lake-specific row.
Statewide: “Pennsylvania has issued a general, statewide health advisory for recreationally caught sport fish: eat no more than one meal (1/2 pound) per week of sport fish caught in the state’s waterways.”
Special regulations (2026 Fishing Summary)
- Big Bass Program: Largemouth, Smallmouth and Spotted Bass: 15-inch minimum and 4 a day (combined) from Jan. 1 through April 10 and from June 13 through Dec. 31; catch and immediate release only from April 11 through June 12, with no tournaments. Other species follow inland rules. (2026 Fishing Summary, p. 11)
Printed Nov 2, 2026. Data as of Oct 4, 2026. Regulations summarized — official Summary and posted signs govern.